Online Education For Gem Enthusiasts

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2,245 Articles
8,403 Members
151 Directory Listings
153,053 Followers

The world's best gem articles, published weekly.

Most Recent Articles

Finding the Best Artificial Lighting for Gems: Buying, Selling, and Grading

Gemstones are creatures of light. Learn how lighting impacts gem sales and get recommendations for high-quality artificial lighting for gems.

Pearl Value, Price, and Jewelry Information

Pearls are the only gems found within living creatures, both salt and freshwater mollusks. However, most pearls on the market today are cultivated, since they now occur extremely rarely in nature. While they require special care, pearls have an enduring appeal for jewelry, particularly as the traditional June birthstone.

Cornered: Online Faceting Designs & Diagrams

Jeff Graham’s Cornered is a checkerboard cut suitable for gem material that’s too dark or large for a standard design.

Top Spots for Gem Hunting in the US

Visit one of the top gem hunting spots in the US. Go alone or with the family. A gemology-themed vacation can be fun, educational, and (maybe) profitable.

Ultraviolet Testing and Gemstone Identification

Ultraviolet testing can be crucial for gemstone identification. Learn the basics of this technique as well as how to make your own UV viewing box.

Augelite Value, Price, and Jewelry Information

Soft and brittle, rare augelites are difficult to cut and unsuitable for wear. Faceted transparent pieces are only found in very complete gem and mineral collections.

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"Becoming a Pro Member of IGS just made good sense for my business. The gemology resources are fantastic, and my profile lets potential customers know I am serious about colored gemstones. And frankly, if I get any exposure to potential customers it's a no-brainer."
Paul Bierker, Paul Michael Designs
Jeweler, IGS Pro Member

The world's best online resource for gemstone appraisal

Over 15 years, we have assembled detailed pricing and value information for appraising over 70 different gemstones. The values in our guide come from a variety of sources including primary and secondary gemstone dealers, jewelers, miners, and wholesale suppliers of commonly traded gemstones.

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